JP2017054489A - Storage system, archive processing method, storage communication device, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an archive process of replacing a file with a dummy file uninfluenced by communication traffic.SOLUTION: A storage system 1 copies a file stored in a primary storage 11 in a primary storage server 10 and places a copy in a secondary storage 21 in a secondary storage server 20, and keeps a backup state in which a backup file of the file in the primary storage 11 is stored in the secondary storage 21. By performing an archive process of replacing the file stored in the primary storage 11 with a dummy file in the backup state, communication between the primary storage server 10 and the secondary storage server 20 is made unnecessary during the archive process.SELECTED DRAWING: Figure 1

Description

  The present invention performs various processes related to files such as archiving or backup using a plurality of storages connected via a network. In particular, various processes can be performed in a timely manner regardless of the communication status between the storages. The present invention relates to a storage system, an archive processing method, a storage communication device, and a computer program.

  Conventionally, there are systems in which various files created on user terminals are stored (stored) in a storage system provided on the network. Recently, with the development of cloud systems, various files are stored in the cloud system. The use of services is spreading. In a storage system, in order to ensure the safety of a file, a plurality of storages (storage devices) are provided, and files are regularly backed up to another storage. As an example of a storage system, HSM (Hierarchical Storage Management) in which a plurality of storages are provided in a hierarchy is generally known.

  In a storage system having a plurality of storages on a network, a storage that can be read and written at high speed is used as a storage that is accessed by a user (referred to as a primary storage), while a storage that performs file backup (secondary storage) In many cases, a storage device having a storage capacity larger than that of the primary storage but having a low reading / writing speed is used. In a storage system having primary storage and secondary storage with such characteristics, in order to increase the usage efficiency of the primary storage, files stored in the primary storage for a certain period of time, infrequently used files, etc. are copied to the secondary storage. Conventionally, a process of replacing an original file existing in the primary storage with a dummy file (sometimes referred to as a stub file) has been performed.

  The dummy file appears to the user as if the original file was stored in the primary storage, but the original file (referred to as a real file) does not exist in the primary storage, and the secondary storage By making it memorize, it is possible to secure the free space of the primary storage. The process of copying an actual file stored in the primary storage to the secondary storage and replacing the actual file with a dummy file is generally referred to as archiving (or archiving process). Examples of using a dummy file (stub file) in a system having a plurality of storages are described in Patent Documents 1 to 3 below.

JP 2009-289252 A JP 2005-538469 A Japanese Patent Laid-Open No. 10-340232

  In a storage system having a plurality of storages, each storage is connected via a network. Also, when the network is congested, the communication speed between the two decreases, and a situation occurs in which file transmission / reception is hindered. When such network congestion occurs, if the storage system archive processing times overlap, it will be difficult to copy the actual files on the primary storage to the secondary storage, and the archive processing will not be performed smoothly. Problems arise. The influence of such network congestion occurs not only in the archive process but also in the backup process.

  In addition, in a storage system with multiple storages, the contents of files updated on the primary storage side (actual files) are changed to files backed up on the secondary storage due to the timing of file management, system failures, etc. In some cases, the contents of both files are not reflected. If archive processing is performed in such a situation, it may be difficult to return the actual file to the latest state stored on the primary storage side.

  Furthermore, some of the storages may fail.For example, when a failure occurs in the primary storage, a situation occurs in which a dummy file stored in the primary storage cannot be read. It becomes difficult to read the stored real file.

  The present invention has been made in view of such circumstances, and a storage system, an archive processing method, and a storage communication apparatus that can perform processing relating to archive or backup in a timely manner regardless of the influence of network congestion or the like And a computer program.

  In addition, the present invention performs processing related to the file after confirming the contents of the file on the primary storage side and the backup file on the secondary storage side. It is an object of the present invention to provide a storage system, an archive processing method, a storage communication device, and a computer program.

  Furthermore, the present invention provides a storage system, an archive processing method, a storage communication device, and a computer program that can secure a dummy file even if the primary storage side fails by backing up the dummy file to the secondary storage side. The purpose is to do.

  In order to solve the above problems, a storage system according to the present invention includes a first communication device having a first storage device, a second storage device having a larger storage capacity than the first storage device, and the first communication. A storage system comprising a second communication device capable of communicating with the device, and performing archiving processing of a file stored in the first storage device based on an archive condition, wherein the actual file is stored in the first storage device, In the state where the backup file of the actual file is stored in the second storage device, the means for detecting whether or not the archive condition is satisfied, and when the satisfaction of the archive condition is detected, stored in the first storage device The actual file is displayed as the actual file with a smaller data amount than the actual file. It characterized in that it comprises a means for performing a process of replacing the temporary file containing the reference information referred to read the backup file with.

  The storage system according to the present invention compares the actual file stored in the first storage device with the backup file stored in the second storage device when the satisfaction of the archiving condition is detected. Means for determining the difference is provided, and when the contents of the actual file and the backup file are determined to be different, the process of replacing the actual file with the temporary file is not performed.

  Further, in the storage system according to the present invention, the first storage device includes a first folder and a second folder, and the first file processing includes replacing the actual file stored in the first folder with the temporary file. A temporary folder is provided, and the temporary file replaced with the first folder is provided with means for copying to the second folder.

  Furthermore, the storage system according to the present invention detects whether or not a backup condition for backing up a file stored in the first storage device to the second storage device is satisfied, and detects whether the backup condition is satisfied The temporary file copied to the second folder is uploaded to the second communication device so as to be stored in the second storage device as a backup file of the copied temporary file; A means for deleting the copied temporary file from the second folder when the copied temporary file is uploaded.

  Furthermore, the storage system according to the present invention detects whether or not the backup file of the temporary file copied to the second folder is stored in the second storage device when the satisfaction of the backup condition is detected. Means for uploading the copied temporary file to the second communication device when it is detected that a backup file of the copied temporary file is stored in the second storage device. It is characterized by that.

  In the storage system according to the present invention, the first storage device includes a first folder and a second folder, and when the actual file is stored in the first folder of the first storage device, the actual file is stored. Means for copying to the second folder, means for detecting whether or not a backup condition for backing up the file stored in the first storage device to the second storage device is satisfied, and detection of satisfaction of the backup condition And a means for uploading the actual file copied to the second folder to the second communication device so as to be stored in the second storage device as a backup file of the copied actual file. It is characterized by.

  Furthermore, the storage system according to the present invention detects whether the backup file of the actual file copied to the second folder is stored in the second storage device when the satisfaction of the backup condition is detected. Means for not copying the copied actual file to the second communication device when it is detected that a backup file of the copied actual file is stored in the second storage device. It is characterized by.

  The archive processing method according to the present invention includes a first communication device having a first storage device, a second storage device having a larger storage capacity than the first storage device, and is capable of communicating with the first communication device. In an archive processing method in which a storage system including a second communication device performs archive processing of a file stored in the first storage device based on an archive condition, an actual file is stored in the first storage device, and In the state where the backup file of the actual file is stored in the second storage device, the step of detecting whether or not the archive condition is satisfied, and when the satisfaction of the archive condition is detected, the step is stored in the first storage device. The actual file is presented as the actual file with a smaller amount of data than the actual file. Characterized in that it comprises a step of performing a process of replacing the temporary file containing the reference information referred to reading Rutotomoni the backup file.

  The storage communication device according to the present invention is capable of communicating with an external communication device having a storage device, and includes a storage device having a smaller storage capacity than the storage device of the external communication device, and is stored in the storage device In a storage communication device that performs file archiving processing based on archive conditions, an archive is stored in a state where a real file is stored in the storage device and a backup file of the real file is stored in a storage device of an external communication device Means for detecting whether or not the condition is satisfied, and when the satisfaction of the archiving condition is detected, the actual file stored in the storage device is presented as the actual file with a smaller data amount than the actual file. Read the backup file Characterized in that it comprises a means for performing a process of replacing the temporary file containing the reference information referred to out.

  When the storage communication device according to the present invention detects that the archive condition is satisfied, the storage communication device compares the actual file stored in the storage device with the backup file stored in the storage device of the external communication device. A means for determining the difference between the contents is provided, and when the contents of the actual file and the backup file are determined to be different, the process of replacing the actual file with the temporary file is not performed. .

  In the storage communication device according to the present invention, the storage device includes a first folder and a second folder, and the first folder performs a process of replacing the actual file stored in the first folder with the temporary file. The temporary file replaced with the first folder is provided with means for copying to the second folder.

  The storage communication device according to the present invention detects whether a backup condition for backing up a file stored in the storage device to a storage device of an external communication device is satisfied, and detects whether the backup condition is satisfied If so, means for uploading the temporary file copied to the second folder to an external communication device so as to be stored in a storage device of the external communication device as a backup file of the copied temporary file; And a means for deleting the copied temporary file from the second folder when the copied temporary file is uploaded.

  In the storage communication device according to the present invention, the storage device includes a first folder and a second folder. When the actual file is stored in the first folder of the storage device, the actual file is transferred to the second folder. A means for copying, a means for detecting whether or not a backup condition for backing up a file stored in the storage device to a storage device of an external communication device is satisfied, and when the satisfaction of the backup condition is detected, Means for uploading an actual file copied to the second folder to an external communication device so as to be stored in a storage device of the external communication device as a backup file of the copied actual file. And

  The archive processing method according to the present invention is capable of communicating with an external communication device having a storage device, and the storage communication device including a storage device having a smaller storage capacity than the storage device of the external communication device includes the storage device. In the archive processing method for archiving a file stored in the storage device based on an archive condition, the storage communication device stores an actual file in the storage device, and an external communication device has a backup file of the actual file The step of detecting whether or not the archive condition is satisfied in the state stored in the storage device, and when the satisfaction of the archive condition is detected, the actual file stored in the storage device is compared with the actual file. The amount is small and the actual file Together are presented, characterized in that it comprises a step of performing a process of replacing the temporary file containing the reference information referred to read the backup file as.

The computer program according to the present invention is stored in the storage device in a computer having a storage device that can communicate with an external communication device having a storage device and has a smaller storage capacity than the storage device of the external communication device. In a computer program for causing a file to be archived based on archiving conditions, an actual file is stored in the computer and the backup file of the actual file is stored in an external communication device. In the stored state, the step of detecting whether or not the archive condition is satisfied, and when the satisfaction of the archive condition is detected, the actual file stored in the storage device is smaller in data amount than the actual file. And the fruit Characterized in that and a step of performing a process of replacing the temporary file containing the reference information referred to read the backup file while being presented as a file.

  In the present invention, the actual state of the actual file is backed up to the second storage device of the second communication device so that the backup status obtained by the backup process is used in the archive process. By performing the replacement process (corresponding to a dummy file or a stub file), there is no need to exchange files between the first communication apparatus and the second communication apparatus, and the replacement process of the actual file with the temporary file is Since the process is completed within the first communication device, the archive process can be completed regardless of the influence of the congestion level of the network.

  The archiving process according to the present invention has a general archiving process meaning that an actual file stored in the primary storage (first storage device) is copied (or moved) to the secondary storage (second storage device). In addition, the process of replacing a real file with a dummy file is included in the meaning of the archive process. For this reason, the term “archive condition” relating to the archive process includes the meaning of the condition for performing the process of replacing the actual file with the dummy file. The contents of the archiving conditions are as follows: when a certain period has elapsed since the actual file was stored in the first storage device, when a certain period has elapsed since the last access to the actual file, the current time is the archiving period In addition, it is possible to assume that the usage amount of the first storage device is equal to or greater than a certain value (or the free space is equal to or less than a certain value).

  In the present invention, when it is determined that the archiving conditions are satisfied, the contents of the first storage device and the backup file of the second storage device are compared, and if the contents are different, the actual file is replaced with a temporary file. Since the archiving process is not performed, it is possible to prevent the contents of the latest real file stored in the first storage device from being changed to a backup file having a different content by the archiving process.

  In the present invention, since the temporary file replaced from the actual file is stored in both the first folder and the second folder provided in the first storage device, even if the temporary file in the first folder is stored. Even if it is deleted by a user operation, etc., if a temporary file backed up in the second folder is used, it is possible to return to the original state and return to the state where the actual file can be read, thereby improving the robustness of the system. Be able to.

  In the present invention, the temporary file stored in the second folder of the first storage device is also backed up to the second storage device of the second communication device when the backup condition is satisfied. The temporary file in the second folder backed up to the second storage device is deleted along with the backup, so that the storage capacity of the first storage device can be used effectively. Since the temporary file remains in the second folder, a situation in which the storage capacity of the first storage device is compressed can be avoided.

  In the present invention, if the backup file of the actual file is already stored in the second storage device, the backup process is not performed even if the backup condition is satisfied. Therefore, the first communication device and the second communication device Thus, unnecessary communication processing is not required between them, and the influence of network congestion can be prevented from occurring in various processing.

  In the present invention, once the state in which the actual file is stored in both the first folder and the second folder provided in the first storage device is secured, the actual file on the second folder side is transferred to the second communication device. Uploading to, upload processing can be performed according to the backup conditions. That is, since the actual file stored in the second folder is uploaded to the second communication device, the actual file stored in the first folder is excluded from the backup target and can be freely updated. Thus, the processing of the actual file on the user side can be handled by the actual file in the first folder, and user convenience can be maintained.

  If the contents of the actual file in the first folder are updated, the same process is repeatedly performed to copy the updated actual file to the second folder, and backup processing is performed using the actual file in the second folder. (Upload process) can be performed. With this process, for example, even if a specific file is written to the first folder and the specific file is updated before being backed up to the second storage device, the specific file before the update and the specific after the update As a result, it is possible to guarantee the creation of a backup file for each update generation by updating the same file. In addition, by performing the upload process, it is possible to create a situation in which the actual file is stored in the first storage device and the backup file of the actual file is stored in the second storage device. In this situation, the archive condition is satisfied. If this is done, the environment where archive processing can be performed can be ensured smoothly. Thus, by separating the timing of backup processing and archive processing, backup processing can be executed without waiting for the establishment of archive conditions. Thus, the safety of the file to be processed can be secured.

  In the present invention, a process for replacing a real file with a temporary file while a real file is stored in the first storage device and a backup file of the real file is stored in the second storage device by the backup process. Therefore, the archive process can be completed without performing communication between the first communication apparatus and the second communication apparatus, and the archive process can be performed in a timely manner by preventing the influence of the network congestion on the archive process. Can be executed.

  In the present invention, even if it is determined that the archiving condition is satisfied, if the contents differ between the actual file on the first storage device and the backup file on the second storage device, the actual file is converted to a temporary file. Therefore, the archive process can prevent the contents of the most recent actual file stored in the storage device from being replaced with a backup file having a different contents, thereby ensuring the safety of the actual file.

  In the present invention, since the temporary file replaced from the actual file is stored in both the first folder and the second folder provided in the first storage device, the temporary file in the first folder is deleted by a user operation or the like. Even so, the temporary file backed up in the second folder can be restored to the original state, and the robustness of the system can be improved.

  In the present invention, the temporary file stored in the second folder of the first storage device is also backed up to the second storage device when the backup condition is satisfied, so the temporary file is stored in the second storage device. Since the temporary file in the second folder backed up to the second storage device is deleted along with the backup, the storage capacity of the first storage device can be used effectively.

  In the present invention, if the backup file of the actual file is already stored in the second storage device, the backup process is not performed even if the backup condition is satisfied, so the first communication device and the second communication device It is possible to prevent wasteful communication between them.

  In the present invention, the state where the actual file is stored in both the first folder and the second folder provided in the first storage device is once secured, and then the actual file on the second folder side is stored in the first folder. 2 Upload to the communication device, so upload processing can be performed according to the backup conditions, and the actual file on the first folder side is not related to the upload, ensuring the safety of the actual file. The normal usability of the file can be maintained.

1 is a schematic diagram showing an overall configuration of a storage system according to a first embodiment of the present invention. (A)-(c) is the schematic which shows each condition of the "file operation confirmation process" in a storage system. (A)-(d) is the schematic which shows each condition of the "backup process" in a storage system. (A)-(c) is the schematic which shows each condition of the "archive processing" in a storage system. (A)-(d) is the schematic which shows each condition of the "file read-out process" in a storage system. It is a block diagram which shows the main internal structures of a primary storage server. It is a functional block diagram which shows each function by an agent. It is a block diagram which shows the main internal structures of a secondary storage server. It is a block diagram which shows the main internal structures of a management server. It is a block diagram which shows the main internal structures of a user terminal. (A)-(c) is a 1st-3rd flowchart which shows the process sequence regarding addition, update (change), and deletion performed by "file operation confirmation process". It is a 4th flowchart which shows the process sequence regarding "backup process". It is a 5th flowchart which shows the process sequence regarding "archive processing." It is a 6th flowchart which shows the process sequence regarding "file read-out process". It is the schematic which shows the whole structure of the storage system which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the main internal structures of the primary storage server which concerns on 2nd Embodiment. It is the schematic which shows the whole structure of the storage system which concerns on the modification of 2nd Embodiment. It is the schematic which shows the whole structure of the storage system which concerns on 3rd Embodiment of this invention. It is a block diagram which shows the main internal structures of the communication terminal device which concerns on 3rd Embodiment. It is the schematic which shows the whole structure of the storage system which concerns on 4th Embodiment of this invention. It is a block diagram which shows the main internal structures of the communication terminal device which concerns on 4th Embodiment.

  FIG. 1 shows an overall outline of a storage system 1 according to the first embodiment of the present invention. The storage system 1 according to the first embodiment includes a primary storage server 10 (corresponding to a first communication device or a storage communication device), a secondary storage server 20, and a management server 30. The primary storage server 10 includes a primary storage 11 (corresponding to a first storage device), and the secondary storage server 20 includes a secondary storage 21 (corresponding to a second storage device).

  The storage system 1 of the present embodiment performs a process of backing up a file stored in the primary storage 11 to the secondary storage 21, and in the state where this backup is performed, the file stored in the primary storage 11 is a dummy file ( It is characterized by performing an archiving process such as replacing with a temporary file). The management server 30 stores information associated with processing related to backup or archiving in the management database DB1, and reads information used for returning the file to a predetermined state from the management database DB1 and provides it to the primary storage server 10. Perform processing.

  A dummy file is also called a stub file. It is presented as an original file to an external client terminal so that it can serve as a substitute for the original file. It includes information that can be identified, and reference information that is referred to when acquiring (downloading) a backup file of the original file from the secondary storage 21 without acquiring information from the management server 30. Of course, the data amount of the dummy file is smaller than that of the original file. Files other than dummy files correspond to actual files in the present invention. Examples of such actual files include document data files, spreadsheet data files, and image data generated by various application software. There are files and the like, and particularly image data files such as detailed photographs have a large amount of data. Therefore, it is significant to replace them with dummy files having a small amount of data by archiving.

  The storage system 1 is a system constructed on a network, and provides a user with a service for storing and managing various files as a cloud service. As shown in FIG. 1, as a hardware configuration of the storage system 1, the primary storage server 10 and the secondary storage server 20 are connected by connecting the primary storage server 10 to the secondary storage server 20 and the management server 30 through a network. Communication between the primary storage server 10 and the management server 30 is also possible. The management server 30 is connected to a management terminal 45 that is used by a management server administrator (system administrator or the like). Through this management terminal 45, the system administrator or the like can access the management database DB 1 of the management server 30. The contents and processing status can be checked. The management terminal 45 is basically not included in the elements constituting the storage system 1.

  The storage system 1 communicates with a user terminal 40 (client terminal) used by the user through the primary storage server 10, and a user who uses the cloud service provided by the storage system 1 stores, reads, etc. files through the user terminal 40. To the primary storage server 10. The user terminal 40 and the primary storage server 10 can communicate with each other by being connected via a network.

  The user performs user registration and the like in advance when using the cloud service by the storage system 1, whereby the storage system 1 holds identification information for user identification for each user (user terminal 40). In addition, the process for each user (user terminal 40) can be identified. In the first embodiment, the user terminal 40 corresponds to a device on the cloud service usage side of the storage system 1 and is not included in the elements constituting the storage system 1 according to the first embodiment. Further, in FIG. 1, for simplification of illustration, only one user terminal 40 is shown, but it is possible to provide services to a plurality of user terminals as well as a cloud service by the storage system 1. The user (user terminal) is identified based on the above, and the processing according to the present invention (processing according to the archive processing method) is performed for each user.

  In the storage system 1, the primary storage server 10 uses a storage device (HDD: hard disk drive, SSD: solid state drive) capable of reading and writing files at high speed for the primary storage 11, and thereby the file for the user terminal 40. Can be sent and received and file storage status can be presented quickly. On the other hand, the secondary storage server 20 uses, as the secondary storage 21, a storage device using a storage medium that has a slower read / write speed but a larger storage capacity than the primary storage 11. In the storage system 1, a large number of files can be easily stored by using a storage device having the above characteristics for the secondary storage 21.

  The storage system 1 according to the present invention performs a plurality of types of processing. Among these types of processing, there are a total of four types of “file operation confirmation processing”, “backup processing”, “archive processing”, and “file read processing”. Processing is a major aspect of the present invention. The “file operation confirmation process” is, for example, a process of adding a file (actual file) sent from the user terminal 40 to the primary storage server 10 to the primary storage 11 and storing it, and a content of the file (actual file) once stored This means processing corresponding to update (change), deletion, and the like. The “backup process” means, for example, a process of uploading and copying an actual file stored in the primary storage 11 to the secondary storage 21 and storing it as a backup file of the actual file.

  “Archive process” means, for example, a process of replacing a real file stored in the primary storage 11 with a dummy file to secure a free capacity in the primary storage 11. Further, the “file read processing” downloads a backup file of a real file corresponding to the dummy file from the secondary storage 21 to the primary storage 11 in accordance with a read instruction from the user terminal 40 for the dummy file, and downloads the file. The backup file is provided as a real file to the user terminal 40 that has issued the read instruction.

  FIGS. 2A to 2C show an outline of the “file operation confirmation process” in the four main types of processes described above for each process status. The primary storage 11 is provided with storage areas such as a backup / archive folder 11a (hereinafter referred to as a B / A folder 11a) and a work folder 11b. The B / A folder 11a is basically a folder for storing various files to be backed up and archived (corresponding to the first storage area corresponding to the first folder), while the working folder 11b is Basically, it is a folder used as a work area that actually performs various processes (corresponding to the second storage area corresponding to the second folder), and also has a buffer meaning.

  First, as shown in FIG. 2A, the actual file d1 transmitted from the user terminal 40 using the cloud service to the primary storage server 10 is added to the B / A folder 11a of the primary storage 11 and stored. The When a file is added to the B / A folder 11a, the primary storage server 10 copies the file to the work folder 11b, whereby the copied real file d1 'is copied as shown in FIG. The state is stored in the work folder 11b. The file name of the copied actual file d1 ′ is given a name obtained by adding additional information (for example, copy date and time) to the file name of the actual file d1 stored in the copy source B / A folder 11a. Processing is performed by the primary storage server 10.

  Then, as shown in FIG. 2C, the primary storage server 10 has file information f1 indicating that the actual file d1 ′ has been copied to the work folder 11b (the file name of the copied file, copied to the work folder 11b). Information indicating date and time) is created and stored in the work folder 11b. By referring to the file information f1, it is possible to grasp the copy status of the actual files d1 and d1 ′. The specific file format of the file information f1 is called an SQL (Structured Query Language) file generally used for database construction, and the file information f1 created in FIG. Is created as an update SQL file.

  2A to 2C described above is the case where the contents of the actual file d1 already stored in the B / A folder 11a of the primary storage 11 are updated (changed) by the process of the user terminal 40. Is done in the same way. That is, when the actual file d1 in the B / A folder 11a of the primary storage 11 is updated, the updated actual file d1 is copied to the work folder 11b and the file information f1 stored in the work folder 11b is added. Information regarding deletion of the actual file d1 before update, and information regarding the actual file d1 'copied by the update (file name of the updated and copied file, date and time of update, date and time of copying to the working folder 11b, etc. Is also added). Such file update processing is performed every time the actual file stored in the B / A folder 11a is updated, and accordingly, the actual file d1 'copied for each update is accumulated in the working folder 11b. Then, by using the stored actual file d1 ′, it is possible to return the actual file d1 to the contents of the desired update time. Thereby, for example, even if a specific file is written in the primary storage 11 (B / A folder 11a) and the specific file is updated before being backed up to the secondary storage 21, Both of the specific files after the update can be backed up, and as a result, the creation of a backup file for each update generation by updating the same file is guaranteed.

  In addition, when an instruction to delete the actual file d1 stored in the B / A folder 11a of the primary storage 11 is issued from the user terminal 40 and the deletion instruction is received by the primary storage server 10, the primary storage server 10 The actual file d1 stored in the B / A folder 11a is deleted, and the file information f1 stored in the work folder 11b indicates that “the actual file d1 has been deleted. The process of adding “name and deletion information of deletion date” is performed. When the actual file d1 ′ copied in the work folder 11b is stored in the deletion process, the deletion of the actual file d1 ′ in the work folder 11b is not performed. By leaving the actual file d1 ′ of the copy of the actual file d1 thus deleted in the working folder 11b, it becomes possible to back up the deleted actual file d1 with the actual file d1 ′ of the working folder 11b. As a result, it is possible to return to the state before deletion of the actual file d1.

  Next, the “backup process” in the above-described four types of processes will be described. The primary storage server 10 detects whether or not the current situation satisfies the backup condition, and detects whether the backup condition is satisfied. In this case, it is detected whether or not the file information f1 is stored in the work folder 11b. When performing the backup process by taking over the state of FIG. 2C described above, the file information f1 functioning as the update SQL file is stored in the work folder 11b. When the notification of starting the backup process is sent to the management server 30 and a response to the notification is received from the management server 30, the primary storage server 10 starts the backup process. However, when the management server 30 is in an inoperable state for some reason, the update processing of the management database DB1 cannot be performed, so the primary storage server 10 does not perform backup.

  At this time, the primary storage server 10 performs a process of renaming the file information f1 stored in the work folder 11b so as to function as a backup SQL file from the update SQL file. This renaming process is a file that functions as an update SQL file when a new file operation (file operation according to addition, update, or deletion of a file shown in FIGS. 2A to 2C) occurs. In order to newly generate information, when file information that functions as a new update SQL file is generated in this manner, the work folder 11b includes file information that functions as a backup SQL file and an update. A total of two pieces of file information, that is, file information that functions as a general SQL file, are stored.

  As the storage status of the update SQL file or the information file f1 functioning as the backup SQL file existing in the work folder 11b, “(1) No update SQL file storage, no backup SQL file storage”, “(2) "Update SQL file storage, no backup SQL file storage", "(3) Update SQL file storage, backup SQL file storage", and "(4) Update SQL file storage, backup SQL file" There are four possible cases of “with memory”.

  In case (1) above, the backup process has been completed and no file operation (addition, update, deletion) has occurred, and in case (2), the backup process has been completed and the file operation ( (Addition, update, deletion of file) has occurred, and in the case of (3) above, the backup process has not been completed and no file operation (addition, update, deletion of file) has occurred. In the case of (4) above, the backup process has not been completed and a file operation (addition, update, deletion) has been performed.

  FIGS. 3A to 3D illustrate an overview of the “backup process”. As shown in FIG. 3A, the primary storage server 10 is stored in the work folder 11b. DB update information f2 is created based on the existing file information f1. The DB update information f2 includes the file name of the actual file d1 ′ to be backed up, information indicating the copy date and time of the actual file d1 ′ to be backed up, the file name when stored as a backup file, and the like. It functions as a database update SQL file. Note that the file information f1 stored in the work folder 11b is deleted with the creation of the DB update information f2.

  Next, the primary storage server 10 detects whether or not the same content as the actual file d1 'to be backed up is already stored in the secondary storage 21, and if it is not stored, the primary storage server 10 The actual file d1 ′ stored in 11b is uploaded to the secondary storage server 20, and the uploaded actual file d1 ″ is stored in the secondary storage 21 as a backup file of the actual file d1 (see FIG. 3B). If it is detected that the same content as the actual file d1 ′ to be backed up is already stored in the secondary storage 21, the primary storage server 10 does not back up (upload) the actual file d1 ′.

  Then, as shown in FIG. 3C, the primary storage server 10 transmits the DB update information f2 stored in the work folder 11b to the management server 30, and when the management server 30 receives the DB update information f2, The received DB update information f2 is stored in the management database DB1, and the contents of the management database DB1 are updated. Then, the primary storage server 10 deletes the actual file d1 ′ and the DB update information f2 stored in the work folder 11b. Through such processing, as shown in FIG. 3D, the actual file d1 is stored in the B / A folder 11a of the primary storage 11, and the actual file of the backup file of the actual file d1 is stored in the secondary storage 21. d1 ″ is stored. In the above description, the backup processing of a single file has basically been described. However, regarding backup processing of a plurality of files, “1: From a backup SQL file to one file. "Extract information", "2: Upload the target file to the secondary storage server 20 for backup", "3: Add the target file information to the DB update SQL file", "4: Target file from the backup SQL file 1 to 4 processes called “delete information” for backup New file information to QL file so that is repeated until no.

  FIGS. 4A to 4C illustrate the processing status of the outline of the “archive processing” among the four types of processing described above. This “archive processing” is performed by the above-described “backup processing”. The process is started on the assumption that the backup completion state shown in FIG.

  The primary storage server 10 detects whether or not the current situation satisfies the archive condition, and transmits an archive start notification to the management server 30 when the satisfaction of the archive condition is detected (see FIG. 4A). When the primary storage server 10 receives the archive file information f3 sent from the management server 30 in response to the transmission of the archive start notification, the primary storage server 10 performs a process of storing it in the work folder 11b. The archive file information f3 is information extracted from the management database DB1 for the actual file d1 to be archived, and is contained in the DB update information f2 sent to the management server 30 in the stage of FIG. It contains the contents according to.

  Next, as shown in FIG. 4B, the primary storage server 10 reads the archive file information f3 from the work folder 11b, and generates a dummy file d11 based on the information included in the archive file information f3. (Create) and archive processing is executed to replace the actual file with the dummy file d11. The dummy file d11 generated by this process includes reference information that is referred to when the backup file (actual file d1 ″) is read from the secondary storage 21 in the dummy file read process. The archive file information f3 includes a plurality of pieces of reference information. When a file to be processed is specified, “1: Extract information of one file to be processed from archive file information f3”, “2: Generate dummy file based on extracted file information”, “3: Generate The first to third processes of “replace and update the processing target file with the dummy file” are repeated until there is no information on the processing target file specified by the archive file information f3.

  FIG. 4C shows a process after such an “archive process”, which is performed based on the “file operation confirmation process” shown in FIGS. 2A and 2B described above. That is, the dummy file d11 is newly generated by replacing the actual file d1 with the dummy file d11 in the B / A folder 11a, and the primary storage server 10 copies the dummy file d11 to the working folder 11b. Thus, the copied dummy file d11 ′ is also stored in the working folder 11b. The copied dummy file d11 ′ has a file name obtained by adding additional information (for example, copy date and time) to the file name of the dummy file d11 stored in the copy source B / A folder 11a.

  Further, as in the case shown in FIGS. 3B and 3C, the primary storage server 10 updates the DB corresponding to the archive information update SQL file based on the archive file information f3 stored in the work folder 11b. The information f22 is created, and the created DB update information f22 is transmitted to the management server 30. Upon receiving the DB update information f22, the management server 30 stores the received DB update information f22 in the management database DB1 and manages it. Update the contents of the database DB1. Then, after waiting for a response from the management server 30, the primary storage server 10 deletes the archive file information f3 and the DB update information f22 in the work folder 11b.

  The dummy file d11 ′ copied to the work folder 11b is uploaded to the secondary storage server 20 when the backup conditions are satisfied by the “backup process” shown in FIGS. This is stored in the secondary storage 21 as a backup file of the file d11.

  FIGS. 5A to 5D illustrate the processing status of the outline of the “file reading process” among the four types of processes described above. FIG. 5A illustrates the “archive process” described above. And the dummy file d11 is stored in the B / A folder 11a and the backed-up dummy file d11 ″ is stored in the secondary storage 21. A situation in which the primary storage server 10 has received a file read instruction for the dummy file d11 that appears as a file is shown.

  Upon receiving the read instruction, the primary storage server 10 specifies the actual file d1 ″ (backup file) corresponding to the dummy file d11 from the reference information included in the dummy file d11 stored in the B / A folder 11a, and specifies the specified file. The actual file d1 ″ is sent to the secondary storage server 20 by sending a download request for the actual file d1 ″ to the primary storage server 10. The primary storage server 10 downloads the actual file d1 ″. The dummy file d11 stored in the B / A folder 11a is replaced with the original real file d1, updated, and stored in the B / A folder 11a (see FIG. 5B). The replacement-updated real file d1 is sent from the primary storage server 10 to the user terminal 40 that issued the read instruction.

  Further, by storing the actual file d1 replaced from the dummy file d11 in the B / A folder 11a, the actual file d1 is newly added to the B / A folder 11a. Similarly to the case shown in FIG. 5B, the primary storage server 10 copies the actual file d1 of the B / A folder 11a to the working folder 11b, and stores the copied actual file d1 ′ in the working folder 11b (FIG. 5). (See (c)). At this time, the last access date and time of the file information f1 may be updated so that the actual file d1 is not immediately re-archived. In addition, information for updating the last access date and time of the real file d1 may be added to the file information f1 when the real file d1 is read (the management database DB1 of the management server 30 is updated at the next backup time). Become).

  When the primary storage server 10 detects that the backup condition is satisfied, backup processing is performed. In the situation shown in FIG. 5C, the real file d1 ″ having the same contents is already stored in the secondary storage 21. Therefore, when the primary storage server 10 detects such a state, the real file d1 ′ stored in the working folder 11b is deleted without being uploaded to the secondary storage 21, and is unnecessary. By deleting the actual file d1 ′ stored in the work folder 11b, the actual file d1 is stored in the B / A folder 11a of the primary storage 11 and stored in the storage medium of the secondary storage 21. Is the actual file d1 ″ as a backup file and A state in which the dummy file d11 "is stored is obtained (see FIG. 5 (d)). Hereinafter, continue to detail the primary storage server 10 or the like constituting the storage system 1 to perform the processes described above.

  FIG. 6 shows a main internal configuration of the primary storage server 10 (corresponding to the first communication device or the storage communication device). A server computer is applied to the primary storage server 10 of the present embodiment, and various devices and the like are connected to the MPU 10a that performs overall control and various processes by an internal connection line 10h. Includes a communication module 10b, a RAM 10c, a ROM 10d, an input interface 10e, an output interface 10f, a storage unit 10g, a primary storage 11, and the like.

  The communication module 10b is a communication device corresponding to a connection module with a network, and conforms to a required communication standard (for example, a LAN module). The communication module 10b is connected to a network via a required communication device (not shown, for example, a router or the like), enables communication with the secondary storage server 20 and the management server 30, and the user terminal 40. Communication with is also possible.

  The RAM 10c temporarily stores contents, files, and the like accompanying the processing of the MPU 10a, and the ROM 10d stores programs and the like that define the basic processing contents of the MPU 10a. The input interface 10e is connected to a keyboard 10i, a mouse, and the like for receiving an operation instruction from a system administrator or the like, and transmits the operation instruction received from the system administrator or the like of the primary storage server 10 to the MPU 10a. The output interface 10f is connected to a display 10j (display output device), and outputs contents associated with the processing of the MPU 10a to the display 10j so that a system administrator or the like can check the current processing contents. .

  The storage unit 10g stores programs and the like, and specifically stores a server program P1, a processing program P2, and the like. The server program P1 defines various processes according to the operating system for the server computer, and the primary storage server 10 functions as a server computer when the MPU 10a performs processes based on the defined contents. The processing program P2 is a computer program that defines that the MPU 10a performs control of various processes according to the present invention, and the control processing content performed by the primary storage server 10 in each of the processes shown in FIGS. It is programmed. In the present embodiment, the MPU 10a performs various processes as the agent 15 depending on the program contents of the processing program P2.

  FIG. 7 is a functional block diagram showing in block form each function performed by the MPU 10a as the agent 15 according to the specified contents of the processing program P2. The MPU 10a displays the contents (1) to (13) shown in FIG. Acts as a means to do. The functions of the agent 15 include “(1) file backup management function”, “(2) file archive management function”, “(3) file restore function”, “(4) file unarchive management function”, “(5 ) File read detection function ”,“ (6) File addition / update / deletion detection function ”,“ (7) File upload function ”,“ (8) Time management function ”,“ (9) Storage usage rate monitoring function ”, There are “(10) database update function”, “(11) management server communication function”, “(12) dummy file generation function”, “(13) file download function”, etc., and processing according to these functions The MPU 10a performs the primary operation in the “file operation confirmation process” to the “file read process” in FIGS. Various processes described as being performed by the storage server 10 are substantially performed.

  “(1) File backup management function” is a function related to “backup processing” shown in FIG. 3A and the like, and when a satisfaction of backup conditions is detected, a new one is added to the primary storage 11 (work folder 11b). This is a function corresponding to a process of uploading and backing up the files to the secondary storage 21 if files that have been added or updated are added. Further, “(1) File backup management function” also includes a function process for transmitting backup history and file information of a backed up file to the management server 30.

  The “(2) file archive management function” is a function related to “archive processing” shown in FIG. 4A and the like. When the satisfaction of the archive condition is detected, the actual operation instructed by the archive file information f3 from the management server 30 is performed. Replace the file with a dummy file. Further, “(2) File archive management function” also includes a function process for transmitting the archive history and file information of the dummy file subjected to the archive process to the management server 30.

  The “(3) file restore function” temporarily adds or updates a dummy file and then updates it to a real file according to designation. By performing such designation in the management server 30, based on the instruction of the management server 30, the primary storage 11 is reconstructed to a specific date state, and the date and time when a specific folder or file in the primary storage 11 is designated. Returning to the state is possible by shortening the processing time. The function processing for sending the restore history to the management server 30 also includes “(3) file restore function”.

  “(4) File unarchive management function” is a function corresponding to a process of updating (replacement) a dummy file to a real file in order to return the dummy file instructed by the management server 30 to the real file. The “(5) file read detection function” detects a file read instruction from the user terminal 40, and if the read target is a real file, reads the real file stored in the primary storage 11, and the user terminal 40 If the read target is a dummy file, using the “(13) file download function”, as shown in the “file read process” in FIGS. 5A to 5D, the secondary storage The actual file stored as the backup file in 21 is downloaded to the primary storage 11, the dummy file is replaced with the downloaded actual file, and then the replaced actual file is sent to the user terminal 40.

  “(6) File addition / update / deletion detection function” monitors file access in the primary storage 11 and detects an event of file addition / update / deletion according to “file operation confirmation processing”. This function generates file information for file backup.

  The “(7) file upload function” is a function for uploading a file stored in the work folder 11 b of the primary storage 11 to the secondary storage 21 for backup. “(8) Time management function” means that the management server 30 detects a notification of a backup period related to a preset backup condition and an archive period related to an archive condition, and detects this type of notification. , “(1) File backup management function” and “(2) File archive management function” are performed.

  “(9) Storage usage rate monitoring function” means that the usage rate (or free capacity) of the primary storage 11 is monitored, and the preset usage rate has been exceeded (or has fallen below the preset free capacity). ) Is a function that activates “(2) File archive management function”. “(10) Database update function” means that the history and file management information of each process is registered in the management database DB1 of the management server 30 by generating such history and information (various SQL files). It is a function to send to 30.

  The “(11) management server communication function” is a function for performing communication with the management server 30 through the processing of each function described above, and using this function, notification of backup processing and archive processing is sent to the primary server. 10 to the management server 30 and receives a response sent from the management server 30.

  The “(12) dummy file generation function” is a function for generating a dummy file for replacing an actual file from the archive file information f3 when the satisfaction of the archive condition is detected. As described above, the generated dummy file includes reference information. This reference information includes file name information including the file name of the original actual file, information necessary for reading the backup file, and the like. Have. The secondary storage 21 of the present embodiment uses an object storage (generally referred to as Amazon S3-compatible storage) in which an object corresponding to a file is directly written, or a storage that also supports NAS (Network Attached Storage) In some cases, the dummy file includes a unique ID (object ID, corresponding to object identification information) as an object in the reference information.

  This object ID is based on a 128-bit hash value from arbitrary length data generated by the hash function. If the hash value is recalculated and compared, and the compared files have different values, they are different. Can be detected. Object ID specification is file_client ID (3-digit decimal number) _file name MD5_update date / time (yyyyMMddHHmmssSSS: year / month / day / hour / minute / second / millisecond) _file size (19-digit decimal number) _content MD5_sequential number (6-digit decimal number) is conceivable. As an example, there is a content “file_001_c4ca4238a0b923820dcc509a6f75849b_20150101123045777_0000000000000000001_c81e728d9d4c2f636f067f89cc14862c_000001”. The contents of such an object ID are used as the file name of the copied file when an actual file or a dummy file is copied to the work folder 11b of the primary storage 11.

  Further, when NAS is used as the secondary storage 21, data is stored as a file in a directory based on a general file system, unlike the case of S3 compatible storage. When NAS is used for the secondary storage 21, as a dummy file storage directory, a directory indicating the date and time according to the processing at the time of upload or the like is arranged in the order of year, month, day, hour, and minute below the storage directory. A backup file having an object ID as a file name is recorded in the lower layer of the directory which is the lowest directory among them. As an example, the storage directory of the dummy file in the case of uploading at 12:00 on August 27, 2015 can be expressed as “¥¥ storage directory name ¥ 2015 ¥ 08 ¥ 27 ¥ 12 ¥ 00”, Such a dummy file storage directory and file name can be specified by the object ID.

  The “(13) file download function” means that the dummy file stored in the primary storage 11 is replaced with a real file stored as a back file in the secondary storage 21 to transfer from the secondary storage 21 to the primary storage 11. This function downloads actual files (backup files).

  The processing program P2 also defines the processing contents for linking the functions (1) to (13) described above, and the MPU 10a performs the “file operation confirmation” shown in FIGS. Various functions including “processing” to “file reading processing” can be performed as an agent.

  For example, regarding the “file operation confirmation process” shown in FIG. 2A and the like, the agent 15 uses the “(6) file addition / update / deletion detection function” to perform the file operation ( Add / Change / Delete) is detected, and file processing is executed when a file operation is detected. At this time, the agent 15 adds and updates the operation information to the update SQL file in order to leave the file operation history. If the update SQL file is not stored, the agent 15 newly generates it.

  In response to the addition of the file, the agent 15 copies the file added to the B / A folder 11a of the primary storage 11 to the working directory 11b. The reason for copying to the working directory 11b is to enable backup to the file before update / erase even if the file is updated / erased before the file is backed up (uploaded). When the file is added, the agent 15 adds the information of the added file to the update SQL file.

  Further, the agent 15 also copies the file changed in the B / A folder 11a of the primary storage 11 to the work directory 11b even when the file is changed (updated). Then, the agent 15 adds change information about the file information related to the file before the change to the update SQL file and adds the file information of the changed file. Further, regarding the deletion of the file, the agent 15 adds deletion information about the file information regarding the deleted file to the update SQL file.

  With regard to the “backup processing” in FIG. 3A and the like, the agent 15 uses the “(1) file backup management function” to detect the files stored in the work folder 11b of the primary storage 11 as the backup condition is satisfied. Upload to the secondary storage server 20 for backup. This process is for the purpose of improving the integrity of the file, and the file stored in the work folder 11 b of the primary storage 11 is automatically backed up to the secondary storage 21 by the function of the agent 15. At the time of this backup, based on the above contents (file name, etc.) of the update SQL file including the file name of the file copied to the working directory 11b (file name when stored in the secondary storage 21), the agent 15 The file to be backed up is specified and the backup process is executed.

  If the update SQL file or the backup SQL file is stored in the work folder 11a in the backup period (period related to the backup condition) set by the management server 30 at the start of the backup process, the agent 15 The management server 30 is notified that the backup process is to be started, waits for a response, and when a response from the management server 30 is received, the backup process is started. When actually performing the backup process, the agent 15 reads file information from the backup SQL file one file at a time, and executes the following process based on the read contents.

  First, the agent 15 executes a process for writing the uploaded file to the secondary storage 21 such as reading a file stored in the working directory 11 b of the primary storage 11 and uploading the file to the secondary storage server 20. If the backup is successful by this processing, the agent 15 adds the backup completion information and the backup destination file information to the file information of the backed up file, adds them to the database update SQL file, and the backup is performed from the backup SQL file. Delete the file information of a successful file.

  On the other hand, when the backup fails due to the reason that the file in the working directory 11b cannot be read or cannot be written to the storage medium of the secondary storage 21, the agent 15 holds the file information of the backup target file of the backup SQL file. Read the file information of the next file. When handling the deleted file information, the agent 15 adds the file information to the database update SQL file and deletes the file information from the backup SQL file.

  When processing of all the file information included in the backup SQL file is completed, the agent 15 sends the database update SQL file to the management server 30. Thereby, the management server 30 updates the management database DB1. As the backup process is completed, the agent 15 sends a backup completion notification to the management server 30 and receives a result response from the management server 30. If all files have been successfully backed up, the agent 15 deletes the database update SQL file, the backup SQL file, and the file copied to the working directory 11b. If all the files cannot be backed up, the agent 15 deletes the database update SQL file and deletes the file successfully backed up from the files copied to the working directory 11b.

  4A, the agent 15 detects the archive period notified from the management server 30, or detects that the usage rate of the primary storage 11 exceeds a predetermined threshold. Accordingly, the management server 30 is notified of the start of the archiving process, and when a response (file information) is received from the management server 30, the archiving process is started. Note that the usage rate of the primary storage 11 exceeding the threshold value specified in advance also satisfies the archive condition. The contents notified by the agent 15 to the management server 30 include inquiring about file information of a file to be archived, and the response from the management server 30 is read from the management database DB1. Contains file information of the archive target file.

  When performing the archive process, the agent 15 detects (confirms) the type of the file to be archived based on the file information from the management server 30. If the agent 15 detects that the archive process target is a dummy file, Since the file is not subject to archiving, archiving is not performed. On the other hand, if it is detected that the archiving target is a real file, the actual file is archived if the real file is accessible. . If the file comparison is specified in the response from the management server 30, the agent 15 stores the archive target file (actual file) stored in the primary storage 11 and the backup stored in the secondary storage 21. Compare the file (the actual file backup file), determine the difference between the contents, and if the files do not match, do not perform archiving of the mismatched files, Only the determined file is archived.

  Further, since the agent 15 registers the archive information in the management database DB1 of the management server 30 and leaves an archive processing history, if the archive information update SQL file does not exist in the work folder 11a, the archive information is stored. An update SQL file is generated. The agent 15 adds information indicating that the archive processing has been performed on the file information of the actual file to the archive information update SQL file.

  Further, as the “(12) dummy file generation function” described above, the agent 15 performs an archive process of generating a dummy file based on the file information and updating (replaces) the actual file with the generated dummy file. The generated dummy file is subject to backup processing in the same manner as the actual file, and is detected by “(6) File addition / update / deletion detection function”, and the agent 15 copies the dummy file to the work folder 11b. And backup processing.

  When the archiving process is completed for all files notified from the management server 30, the agent 15 updates the archive information and updates the information related to the archive history and the information related to file management included in the management database DB1 of the management server 30. The SQL file for use is transmitted to the management server 30. Thereafter, the agent 15 notifies the management server 30 of the end of the archive process and waits for a response from the management server 30. When the response from the management server 30 is received, the archive information update SQL file is deleted from the work folder 11a.

  When the agent 15 receives a file read instruction from the user terminal 40 regarding the “file read process” in FIG. 5A and the like, the read target by the read instruction is either an actual file or a dummy file on the primary storage 11. It detects whether it exists, and executes processing corresponding to each based on the detection result. That is, if the read target is a real file, the agent 15 reads the real file stored in the primary storage 11 and sends it to the user terminal 40. If the read target is a dummy file, the agent 15 reads the real file. Then, the backup file to be read is downloaded from the secondary storage 21 to the primary storage 11, the dummy file is updated (replaced) with the downloaded backup file (actual file), and the updated actual file is sent to the user terminal 40. It will be. Note that the actual file updated in the primary storage 11 becomes the target of the archive process again when the next archive condition is satisfied.

  In addition to these “file operation confirmation process”, “backup process”, “archive process”, and “file read process”, the agent 15 of this embodiment performs processes such as “restore process” and “unarchive process”. At the same time, a “log information generation process” for periodically uploading an operation log of the user terminal 40 (client) to the management server 30 is also performed.

  “Restore processing” is processing according to the above-mentioned “(3) File restore management function”. Recovery processing in the event of a failure of the primary storage 11 or recovery processing of a file that has been erased / overwritten by mistake. This is done to return all or specific files or folders to a specific date state. A restore instruction is sent from the management server 30 to the primary storage server 10 (agent 15), and when the agent 15 responds to the restore instruction, the restore process is started.

  First, the agent 15 sends an acquisition request for file information to be restored to the management server 30. The management server 30 acquires the file information of the target file from the management database DB1, and sends it to the primary storage server 10 (agent 15). In order to make a transition to a file accessible state in the shortest time, the agent 15 acquires the file information to be restored and temporarily adds and updates the target file stored in the primary storage 11 as a dummy file. At this time, in order to leave the restore history, the agent 15 generates a restore history SQL file in the work folder 11b of the primary storage 11, and performs a process of writing the restore history in the restore history SQL file.

  When the restoration target is a real file, the agent 15 generates a dummy file based on the file information acquired from the management server 30. If the target file does not exist, the agent 15 performs a process of adding a dummy file. If the target file exists, the agent 15 updates the target file with the dummy file. The agent 15 also performs processing for adding the target file information to the download list file for downloading the actual file from the secondary storage 21 to the primary storage server 10.

  When the restore target is a dummy file, the agent 15 downloads the target dummy file from the secondary storage 21. If the target file does not exist, the agent 15 adds the downloaded file. If the target file exists, update it with the downloaded file. When the process of updating all files notified from the management server 30 to the dummy file (restoration process) is completed, the agent 15 updates the file information related to the restore history included in the management database DB1 of the management server 30. Transmits the restore history SQL file to the management server 30.

  Then, the agent 15 sends a notification of the end of the archive processing to the management server 30 and waits for a response from the management server 30. When the agent 15 receives the response from the management server 30, it is stored in the work folder 11b of the primary storage 11. The restore history SQL file is deleted. In order to return the dummy file obtained by the restoration process to the actual file, the agent 15 downloads the actual file from the secondary storage 21 to the primary storage server 10 based on the download list file, and replaces the dummy file with the downloaded actual file. Update.

  The “unarchive processing” is processing according to “(4) File unarchive management function”, and is stored in the primary storage 11 that does not satisfy the archive conditions when the archive conditions are redesignated. This is processing to return (replace) a dummy file that has been changed to a real file. This “unarchive processing” is started when an unarchive instruction is sent from the management server 30 to the primary storage server 10 (agent 15), and the agent 15 receives this unarchive instruction.

  First, the agent 15 sends an inquiry about the file information of the file to be unarchived to the management server 30. The management server 30 identifies the file to be unarchived based on the specified condition, reads the file information of the target file from the file management database, and notifies the agent. Then, the agent 15 executes the unarchive process for the file to be processed based on the file information sent from the management server 30. At this time, the type of the file to be processed is detected, As a result of the detection, if the processing target is a real file, the unarchive processing is not performed, and if the processing target is a dummy file, the unarchive processing is performed. If the processing target is a dummy file and is accessible, the agent 15 adds file information to the download list file for downloading the actual file from the secondary storage 21.

  Then, the agent 15 sends a notification of the end of unarchive processing to the management server 30 and waits for a response from the management server 30. Upon receiving the response from the management server 30, the agent 15 downloads the actual file (actual file backup file) from the secondary storage 21 based on the download list file, and replaces the dummy file with the downloaded actual file. Update to complete the unarchive process. Next, the secondary storage server 20 in the storage system 1 will be described.

  FIG. 8 shows a main internal configuration of the secondary storage server 20 (corresponding to the second communication device) constituting the storage system 1. Similarly to the primary storage server 10, a server computer is applied to the secondary storage server 20 of the present embodiment, and various devices and the like are connected to the MPU 20 a that performs overall control and various processing by an internal connection line 20 h. The various devices include a communication module 20b, a RAM 20c, a ROM 20d, an input interface 20e, an output interface 20f, a storage unit 20g, and a secondary storage 21.

  Since the communication module 20b to the output interface 20f are equivalent to the communication module 10b to the output interface 10f of the primary storage server 10 shown in FIG. 6, the description is omitted (the keyboard 20i connected to the input interface 20e and the output). The display 20i connected to the interface 20f is the same as that of the primary storage server 10).

  The storage unit 20g of the secondary storage server 20 stores a server program P5, a storage program P6, and the like. The server program P5 defines various processes according to the operating system for the server computer. The server program P5 defines processes basically equivalent to the server program P1 of the primary storage server 10 shown in FIG. When the MPU 20a performs the processing based on the secondary storage server 20, the secondary storage server 20 functions as a server computer.

  The storage program P6 defines the processing contents performed by the MPU 20a of the secondary storage server 20 in response to the various processes performed as the agent 15 by the MPU 10a of the primary storage server 10 described above. As specific processing contents, when the secondary storage server 20 receives a file existence confirmation (or comparison confirmation) notification from the primary storage server 10 side, information specifying a file included in the notification (or a comparison target in the notification) The storage program P6 defines that the MPU 20a detects whether or not a backup file corresponding to the specified file is stored in the secondary storage 21. At this time, the MPU 20a compares the file specified by the notification with the backup file stored in the secondary storage 21 to determine whether the contents are the same. Control is performed to send the result (detection result notification) with or without a backup file to the primary storage server 10, and the storage program P6 also defines such control processing of the MPU 20a.

  Further, when the secondary storage server 20 receives a file (real file or dummy file) uploaded from the primary storage server 10, the storage program P6 stores the received file in the secondary storage 21 as a backup file of the file. It is also stipulated that the MPU 20a performs the control process to be performed. Furthermore, when the secondary storage server 20 receives a read instruction for a specific file from the primary storage server 10, the storage program P 6 reads a backup file of the specific file that is the target of the read instruction from the secondary storage 21, and The storage program P6 also prescribes that the MPU 20a performs control processing to be transmitted (downloaded) to the server 10.

  As described above, the secondary storage 21 (corresponding to the second storage device) included in the secondary storage server 20 is an Amazon S3-compatible storage called object storage, and the primary storage 11 (first storage device) of the primary storage server 10. The secondary storage 21 is slower in reading / writing the file (data) than the primary storage 11). Note that the secondary storage 21 may be a NAS. In this case, the file (data) is read and written by the file system function included in the server program P5.

  FIG. 9 shows a main internal configuration of the management server 30 constituting the storage system 1. Similarly to the primary storage server 10, a server computer is applied to the management server 30 of the present embodiment, and various devices and the like are connected to the MPU 30a that performs overall control and various processing by an internal connection line 30h. The various devices include a communication module 30b, a RAM 30c, a ROM 30d, an input interface 30e, an output interface 30f, and a storage unit 30g.

  The communication module 30b to the output interface 30f are the same as the communication module 10b to the output interface 10f of the primary storage server 10 shown in FIG. The keyboard 30i connected to 30e and the display 30i connected to the output interface 30f are the same as those of the primary storage server 10).

  The storage unit 30g of the management server 30 is configured by an HDD or the like, and stores programs such as the server program P10 and the management program P11, and also stores a backup period J1 related to backup processing and an archive period J2 related to archive processing. In addition, a management database DB1 for accumulating various information related to file processing in the storage system 1 is also stored. The server program P10 defines various processes according to the operating system for the server computer. The server program P10 defines processes basically equivalent to the server program P1 of the primary storage server 10 shown in FIG. When the MPU 30a performs the processing based on the management server 30, the management server 30 functions as a server computer.

  The management program P11 performs processing related to the backup period included in the backup period J1, processing related to the archive period included in the archive period J2, response processing to various notifications from the primary server storage 10, various information (various SQL files) The contents of control processing performed by the MPU 30a are defined for the writing / reading processing of the information etc.).

  The backup period J1 is a period in which backup processing is specified as a backup condition, and is generally a night time period (for example, a time period from 1 am to 5 am) in which the user's usage opportunities tend to decrease. Is set by the system administrator as the backup period J1. As a specific method of setting the backup period J1, in addition to specifying the backup start time and the backup end time, a method of specifying the backup start time and the backup time (for example, 4 hours) can be considered. In addition to setting the same time zone every day, the backup period J1 can also be set to different time zones in units such as days of the week. The contents of the backup period J1 are appropriately set by the operation of the system administrator. It can be set.

  The archiving period J2 is included in the archiving conditions, includes a period for performing archiving processing (archive period), and the setting method of the archiving period J2 is the same as the above-described backup period, and the archive to be set Setting the period J2 to the same time zone every day, making it different for each day of the week, and the like are the same as in the backup period J1. In addition, the archive period J2 includes setting whether or not to perform a file comparison process when performing the archive process, and these setting contents can be appropriately set by the system administrator.

  As specific processing contents defined by the management program P11 for “backup processing”, the MPU 30a detects whether the current time has entered the backup period J1 using the clock function of the MPU 30a. The management program P11 also stipulates that when the current time has entered the backup period J2, the MPU 30a performs processing to send a notification that the archive period has been entered to the primary storage server 10. The management program P11 also defines that when the management server 30 receives the notification of the start of the backup process sent from the primary storage server 10, the MPU 30a performs a process of transmitting a response to the start to the primary storage server 10. To do. Further, when receiving the DB update information f2 (database update SQL file) sent from the primary storage server 10, the management program P11 specifies that the MPU 30a performs the process of storing in the management database DB1.

  As specific processing contents defined by the management program P11 for the “archive processing”, the MPU 30a detects whether the current time has entered the archive period J2 using the clock function of the MPU 30a. The management program P11 also stipulates that the MPU 30a performs a process of sending a notification that the archive period has been entered to the primary storage server 10 when it is detected that the current time has entered the archive period J2. When the management server 30 receives an inquiry about a file to be archived sent from the primary storage server 10, the file to be processed is identified, and the file information of the identified file is read from the management database DB1, The management program P11 defines that the MPU 30a performs processing to send to the primary storage server 10 as the archive file information f3. If it is set that the comparison process is performed in the archive period J2, the MPU 30a also includes an instruction to perform the comparison process in the archive file information f3.

  Further, when the management program P11 receives the DB update information f2 (database update SQL file) and the notification of the end of the archive process sent from the primary storage server 10 upon completion of the “archive processing”, the management program P11 Performs processing to be stored in the management database DB1, and specifies that the MPU 30a performs control to send a response to the notification to the primary storage server 10 for the notification of the archive end processing.

  FIG. 10 is a block diagram showing the main configuration of the user terminal 40 which is a client terminal. As the user terminal 40, a communication terminal device capable of communicating with the primary storage server 10 and a file handling process can be applied. Specifically, a personal computer, a tablet, a smartphone or the like having a communication function can be used. It can be used as the user terminal 40. FIG. 10 shows a main configuration when a personal computer is used as the user terminal 40, but the basic configuration is the same as that of FIG. 10 even when a tablet, a smartphone, or the like is used as the user terminal 40.

  The user terminal 40 is configured by connecting various devices and the like to the CPU 40a that performs overall control and various processes through an internal connection line 40h. The various devices and the like include a communication module 40b, a RAM 40c, a ROM 40d, and an input interface. 40e, an output interface 40f, and a storage unit 40g.

  The communication module 40b is a communication device corresponding to a connection module with a network, and conforms to a required communication standard (for example, a LAN module), and a required communication device (not shown; for example, a router or the like). By connecting to the network via the network, communication with the primary storage server 10 is enabled.

The RAM 40c temporarily stores contents, files, and the like accompanying the processing of the CPU 40a, and the ROM 40d stores programs and the like that define the basic processing contents of the MPU 40a. The input interface 40e is connected to a keyboard 40i that accepts an operation instruction from the user, a mouse, and the like, and transmits the operation instruction received from the user to the CPU 40a. The output interface 40f is connected to the display 40j, and outputs the contents accompanying the processing of the CPU 40a to the display 40j so that the user can visually confirm the operation contents, the processing contents of the user terminal 40, and the like. .

  The storage unit 10g is a storage device configured by an HDD (Hard Disc Drive), an SSD (Solid State Drive), or the like, and stores a basic program P20, an application program P21, and the like. The basic program P20 defines basic processing performed by the CPU 40a to cause the user terminal 40 to function as a computer. The basic program P20 performs file management (file copy, movement, change, etc.). Functions, browser functions for browsing websites, and the like. Based on the file management function included in the basic program P20, the user instructs the primary storage server 10 from the user terminal 40 to operate the file (instruction to add a file, instruct to copy, etc.) or to read out a file for a predetermined file. Can be sent. Note that the application program P21 is software corresponding to work individually performed by a user such as a word processor, spreadsheet, figure drawing, and the like, and various files including files generated by such an application program P21 or the like are included in the present invention. It becomes a processing target.

  The management terminal 45 shown in FIG. 1 is basically the same as the user terminal 40 described above, and can communicate with the management server 30 through the network, and the management application program P31 is installed. Thus, the system administrator can remotely perform various settings related to the management server 30 and various operations / confirmations for the management database DB1.

  11A to 11C show the contents of the processing procedure (archive processing) performed mainly by the primary storage server 10 (MPU 10a functioning as the agent 15) in the “file operation confirmation processing” for the storage system 1 configured as described above. It is the 1st-3rd flowchart explaining the content of the method.

  The first flowchart of FIG. 11A shows the processing procedure of the primary storage server 10 (same meaning as the agent 15; the same applies hereinafter) regarding the file addition in the “file operation confirmation processing”. First, the primary storage server 10 It is detected whether or not a file to be added to the primary storage 11 sent from the user terminal 40 has been received (S1). If no file has been received (S1: NO), the process waits for a file to be sent from the user terminal 40. If a file has been received (S1: YES), the primary storage server 10 can receive the files shown in FIGS. ), The received file (actual file d1) is stored in the B / A folder 11a of the primary storage 11 and added (S2).

  Then, as shown in FIG. 2B, the primary storage server 10 performs a process of copying and storing the file (actual file d1) added to the B / A folder 11a in the work folder 11b (S3). Then, as shown in FIG. 2C, the primary storage server 10 stores file information f1 (update SQL file) including information related to the file addition operation for the copied file (actual file d1 ′) in the work folder 11a. Create (S4), and once complete the processing related to “add file”. The primary storage server 10 performs the processing contents shown in the first flowchart of FIG. 11A every time a file is sent from the user terminal 40 thereafter. Further, the processes of S3 and S4 in the first flowchart are similarly performed for the dummy file. When the dummy file is added to the B / A folder 11a, the processes of S3 and S4 are performed for the dummy file.

  The second flowchart of FIG. 11B shows a processing procedure of the primary storage server 10 regarding file update (change) in the “file operation confirmation process”. First, the primary storage server 10 is sent from the user terminal 40. It is detected whether an update file (file for updating a file already stored in the primary storage server 10) has been received (S5). When the update file has not been received (S5: NO), it waits for the update file to be sent from the user terminal 40. When the update file is received (S5: YES), the primary storage server 10 receives the update file. Is added to the B / A folder 11a of the primary storage 11 (S6).

  Then, the primary storage server 10 performs a process of copying and storing the update file added to the B / A folder 11a in the work folder 11b (S7). The primary storage server 10 adds information (update information) related to the file update operation for the copied update file to the file information (update SQL file) stored in the work folder 11a (S8), The process related to “file update” is terminated. The primary storage server 10 performs the processing shown in the second flowchart of FIG. 11B every time an update file is sent from the user terminal 40 thereafter.

  The third flowchart of FIG. 11C shows a processing procedure of the primary storage server 10 regarding file deletion in the “file operation confirmation process”. First, the primary storage server 10 sends the primary storage server sent from the user terminal 40. It is detected whether or not an instruction to delete a file already stored in 10 has been received (S9). When the deletion instruction has not been received (S9: NO), a deletion instruction from the user terminal 40 is awaited. When the deletion instruction is received (S9: YES), the primary storage server 10 determines the file to be deleted. Is deleted from the B / A folder 11a of the primary storage 11 (S10). At this time, even if a file corresponding to the deletion instruction is stored in the work folder 11b, the primary storage server 10 does not delete the file in the work folder 11b.

  Then, the primary storage server 10 adds the file information (update SQL file) stored in the work folder 11a to the file information (deletion information) about the deleted file (S11). The process related to “is finished. The primary storage server 10 performs the processing contents shown in the second flowchart of FIG. 11B every time a deletion instruction is received from the user terminal 40 thereafter.

  The fourth flowchart in FIG. 12 explains the contents of the processing procedure performed by the primary storage server 10 in “backup processing” (the contents of backup processing in the archive processing method). As shown in FIG. 2C, the fourth flowchart shows a case where the process is started in a state where the file information f1 is stored in the work folder 11a. First, the primary storage server 10 detects whether or not the current state satisfies the backup condition (S12). Satisfaction of the backup condition in the present embodiment is two cases, and the first is a case where it is detected that the management server 30 has received a notification that the current time has entered the backup period. The first case is when it is detected that the usage rate of the primary storage 11 exceeds a preset threshold value.

  When the satisfaction of the backup condition is not detected (S12: NO), it waits until the backup condition is satisfied, and when the satisfaction of the backup condition is detected (S12: YES), the primary storage server 10 performs the backup process. Is sent to the management server 30 (S13).

  Then, the primary storage server 10 detects whether or not a response from the management server 30 has been received (S14). If no response has been received (S14: NO), the primary storage server 10 waits for a response and receives a response (S14). : YES), as shown in FIG. 3A, DB update information f2 is created based on the file information f1 of the work folder 11a (S15). Then, the primary storage server 10 detects whether or not the backup file of the real file to be backed up is stored in the secondary storage 21 by inquiring to the secondary storage server 20 (S16). When it is detected that the backup file of the real file is not stored by receiving the notification that the backup file of the real file to be backed up is not stored (S16: NO), the primary storage server 10 determines that the backup file of FIG. ), The actual file d1 ′ stored in the work folder 11b is uploaded to the secondary storage server 20 (S17). As a result of the upload, the backup file (actual file d1 ″) is stored in the secondary storage 21.

  Then, the primary storage server 10 sends the DB update information f2 to the management server 30 (S18). When the management server 30 receives the DB update information f2 from the primary storage server 10, the management server 30 updates the contents of the management database DB1 with the DB update information f2. After the transmission of the DB update information f2 (S18), the primary storage server 10 deletes the DB update information f2 of the work folder 11b (S19), and also deletes the actual file d1 ′ of the work folder 11b (S20), FIG. As shown in (d), a state is created in which the actual file d1 is stored in the primary storage 11 and the backup file (actual file d1 ″) is stored in the secondary storage 21. When the backup file has already been stored in the secondary storage 21 (S16: YES), the primary storage server 10 does not upload the actual file d1 'copied to the working folder 11b to the secondary storage server 20, and Steps S19 and S20 are performed. If there are a plurality of files to be subjected to the backup process, the primary storage server 10 repeats the process of the fourth flowchart a plurality of times. However, the process may be a process of repeatedly uploading a plurality of files.

  In addition, when a notification that the current time is out of the backup period is sent from the management server 30 while the backup process is being performed, the primary storage server 10 completes the intermediate backup process until the end. The file remaining as the backup target at that time is interrupted without performing the backup process, and the backup process is performed by performing a process for enabling the management server 30 to update the management database DB1. finish. Note that files remaining as backup targets are subjected to backup processing when the next backup condition is satisfied.

  In the above description, the file to be backed up is described as a real file, but the dummy file stored in the work folder 11b of the primary storage 11 is also backed up in the same procedure as the case of the real file described in the fourth flowchart. In this case, in the description of the processing procedure of the above-described fourth flowchart, the actual file location is replaced with a dummy file.

  The fifth flowchart in FIG. 13 describes the contents of the processing procedure (the contents of the archive processing method) performed by the primary storage server 10 in the “archive processing”. The fifth flowchart shows the case where the process is started in the state shown in FIG. 3D and the process when the contents of the files to be archived are compared. Yes.

  First, the primary storage server 10 detects whether or not the current state satisfies the archive condition (S21). In addition, the satisfaction of the archive condition in this embodiment is the same as in the case of the satisfaction of the backup condition described above, and the first is notification from the management server 30 that the current time has entered the archive period. The second is a case where it is detected that the usage rate of the primary storage 11 exceeds a preset threshold value.

  If the satisfaction of the archive condition is not detected (S21: NO), the state waits until the archive condition is satisfied. If the satisfaction of the archive condition is detected (S21: YES), the primary storage server 10 performs the archive process. Is sent to the management server 30 (notification including requesting file information to be archived) (S22). In addition, when the management server 30 receives the archive processing start notification from the primary storage server 10, the management server 30 reads information on the file to be archived from the management database DB 1 and sends it to the primary storage server 10 as archive file information. .

  In the present embodiment, the file to be archived is a file that has been stored for a period of time after being stored in the primary storage 11 or a file that has been updated from the stored state and has passed a fixed period of time. The predetermined period is set in advance by the system administrator in the management server 30 in accordance with the system specifications such as three days or one week. Further, when the usage rate of the primary storage exceeds the threshold value, the files are stored in the primary storage 11 in the order of the oldest file among the files stored in the primary storage 11.

  The primary storage server 10 detects whether or not archive file information has been received from the management server 30 (S23). If the archive file information has not been received (S23: NO), the primary storage server 10 waits for the transmission. When the archive file information is received (S23: YES), the received archive file information is stored in the work folder 11b as shown in FIG. 4A (S24). The primary storage server 10 then has the same contents as the actual file d1 to be archived stored in the B / A folder 11a and the backup file (actual file d1 ″) stored in the secondary storage 21. It is compared and determined by making an inquiry to the secondary storage server 20 (S25).

  When it is determined from the reply from the secondary storage server 20 that the contents are the same (S25: YES), as shown in FIG. 4B, the primary storage server 10 stores the archive file information stored in the work folder 11b. Based on the information included in f3, a dummy file d11 is created, and the dummy file d11 is updated by replacing the actual file d1 (S26). Then, as shown in FIG. 4C, the primary storage server 10 creates DB update information f22 (archive information update SQL file) based on the archive file information f3, and sends it to the management server 30 (S27). When the management server 30 receives the DB update information f22 from the primary storage server 10, the management server 30 updates the contents of the management database DB1 with the DB update information f22. Then, the primary storage server 10 deletes the archive file information f3 and the DB update information f22 in the working folder 11b (S28).

  If it is determined in step S25 that the actual file d1 stored in the B / A folder 11a is different from the backup file (actual file d1 ″) stored in the secondary storage 21 (S25: NO) The primary storage server 10 ends the processing for the actual file d1 without creating a dummy file, and the primary storage server 10 periodically (for example, every 1 minute) within the archive period ) The management server 30 is inquired about a file to be archived, and if there is a file to be processed, the primary storage server 10 repeats the process of the fifth flowchart. I explained the target of the real file, but once archived The archive process may be performed again on the file downloaded to the primary storage 11 by the read process after the process is performed (however, the archive condition is satisfied for a period until a certain period after the download has elapsed). (This period is not subject to archive processing.) Note that dummy files are not subject to archive processing.

  The sixth flowchart in FIG. 14 describes the contents of the processing procedure (the contents of the archive processing method) performed by the primary storage server 10 in the “file reading process”. This sixth flowchart corresponds to the processing when the user terminal 40 sends an instruction to read the dummy file d11 presented at the user terminal 40 as the actual file d1 to the primary storage server 10 in the state shown in FIG. Shall be.

  First, the primary storage server 10 detects whether or not a read instruction for a file (dummy file d11) sent from the user terminal 40 has been received (S30). When a read instruction has not been received (S30: NO), a read instruction from the user terminal 40 is waited. When a read instruction has been received (S30: YES), the primary storage server 10 is a dummy subject to the read instruction. Based on the information included in the file d11, a download request for the actual file backup file (actual file d1 ″) is transmitted to the secondary storage server 20 (S31).

  Next, the primary storage server 10 determines whether or not a backup file (actual file d1 ″) is downloaded from the secondary storage server 20 (S32). If not downloaded (S32: NO), the download is performed. When waiting and downloading (S32: YES), the dummy file d11 is replaced with the downloaded backup file (actual file d1 ″) as the actual file d1 (S33), and the updated actual file d1 is updated. The data is sent to the user terminal 40 (S34). With this process, even if the user terminal 40 issues an instruction to read a dummy file presented as a real file, the real file is sent from the primary storage server 10, so the user is aware of the dummy file. Various file operations can be performed without any problem.

  As described above, the storage system 1 according to the present embodiment performs the archiving process in the backup state, so that the archiving process can be completed smoothly without being influenced by the communication status between the primary storage server 10 and the secondary storage server 20. . Further, since the dummy file generated for the archiving process is also backed up to the secondary storage 21, even if the dummy file disappears from the primary storage 11 for some reason, it can be restored to the original state by the backed up dummy file d11 ″. Can ensure a robust system.

  Note that the storage system 1 of the first embodiment is not limited to the above description, and various modifications can be assumed. For example, as the secondary storage 21 used in the secondary storage server 20, a storage device using another type of storage medium (for example, a magnetic storage tape or an optical storage disk) is used in addition to the storage device using the HDD. Is possible.

  Further, the file to be archived is finally read (accessed) from the user terminal 40 by managing time-lapse information regarding the reading of the file stored in the primary storage 11. Alternatively, a file that has passed a certain time may be set as an archive processing target. By doing so, it is possible to avoid replacing a frequently accessed file with a dummy file from the user terminal 40 and leave it as a real file in the primary storage 11 to support frequent access from the user terminal 40. It becomes easy.

  Further, regarding the backup condition, in the above description, the management server 30 detects whether the current time has entered the backup period, and the detected result notifies the primary storage server 10 that the backup period has been entered. However, the management server 30 sends the backup conditions (the set backup period) to the primary storage server 10 in advance and stores them in the primary storage server 10, and the primary storage server 10 (MPU 10a) It is also possible to determine whether the time has entered as a backup condition.

  The same applies to the archive condition, and the primary storage server 10 may store the archive period in advance and determine whether the current time has entered the archive period. When the file stored in the primary storage 11 and the file stored in the secondary storage 21 are compared to detect the content difference, the file stored in the secondary storage 21 is downloaded to the primary storage server 10. The primary storage server 10 (MPU 10a) can also compare the contents of both files.

  FIG. 15 shows an overall outline of the storage system 50 according to the second embodiment of the present invention. The storage system 50 according to the second embodiment has a configuration in which the primary storage server 10 and the management server 30 in the storage system 1 according to the first embodiment are combined and aggregated as one primary storage server 60. By providing the role of the management server 30 of the first embodiment, the system configuration is simplified compared to the first embodiment (the management server can be omitted), and the primary storage server used in the first embodiment 10 and the management server 30 are characterized in that the processing in the primary storage server 60 can be completed. Note that the secondary storage server 20, user terminal 40, and management terminal 45 in the storage system 50 of the second embodiment shown in FIG. 15 are basically the same as those of the first embodiment (the secondary storage of the secondary storage server 20). 21 is similar to the first embodiment in that the storage capacity is larger than the primary storage 61 of the primary storage server 60).

  FIG. 15 shows a main internal configuration of the primary storage server 60 (corresponding to the first communication device or the storage communication device) of the second embodiment, which is basically the same as that shown in FIG. A communication module 60b, RAM 60c, ROM 60d, input interface 60e, output interface 60f, storage unit 60g, primary storage 61, and the like are connected to an MPU 60a that performs general control and various processes by an internal connection line 60h. However, the content stored in the storage unit 60g is different from the first embodiment.

  In addition to the server program P1 and processing program P2 stored in the storage unit 10g shown in FIG. 6, the storage unit 60g includes a management program P11 stored in the storage unit 30g of the management server 30 shown in FIG. The period J1, the archive period J2, and the management database DB1 are stored. As described above, the management program P11 stored in the management server 30g causes the MPU 60a of the second embodiment to function as the agent 65, and also performs control processing performed by the management server 30 of the first embodiment. It is like that. Therefore, the communication process between the primary storage server 10 and the management server 30 performed in the first embodiment is limited to the exchange in the primary storage server 60 between the processing program P2 and the management program P11. Compared to the first embodiment, the embodiment can perform the processing speedily as a whole.

  Specifically, the satisfaction of the backup condition of S12 in the fourth flowchart of FIG. 12 indicates whether the backup condition satisfies the backup condition by entering the backup period J1 by the backup period J1 stored in the storage unit 60g. , MPU 60a will detect. In addition, the backup processing start notification in S13 and the responses in S14 and S15 are completed within the MPU 60a itself. Furthermore, sending the DB update information f2 in S18 to the management server 30 means that the DB update information f2 stored in the work folder 61b of the primary storage 61 is sent to the management database DB1 stored in the storage unit 60g through the internal connection line 60h. And update the contents of the management database DB1.

  Further, regarding the satisfaction of the archive condition of S21 in the fifth flowchart of FIG. 13, whether or not the archive condition is satisfied by the current time entering the archive period J2 by the archive period J2 stored in the storage unit 60g. , MPU 60a will detect. Further, the start notification of the archive processing in S22 and the reception of the archive file information in S23 are also completed within the MPU 60a itself. Further, sending the DB update information f22 in S27 to the management server 30 stores the DB update information f22 stored in the work folder 61b of the primary storage 61 in the storage unit 60g through the internal connection line 60h as described above. Sent to the management database DB1, and the contents of the management database DB1 can be updated.

  As described above, the storage system 50 according to the second embodiment realizes a robust system configuration that does not depend on the communication environment by integrating the primary storage server and the management server. The storage system 50 according to the second embodiment is the same as the first embodiment in other respects. Also, various modifications can be assumed in the second embodiment. For example, the management database DB1 may be stored in the primary storage 61 instead of being stored in the storage unit 60g. When the management database DB1 is stored in the primary storage 61, if the management database DB1 itself is copied as a backup to the secondary storage 21 of the secondary storage server 20, even if the primary storage 61 fails, The management database DB1 that has been backed up can restore the original state.

  FIG. 17 shows one storage system 50 ′ according to a modification of the second embodiment. The storage system 50 ′ of this modification is characterized in that the primary storage 60 ′ does not have the management database DB1 in the primary storage 61 ′, but stores the management database DB1 in the secondary storage 21 ′ of the secondary storage server 20 ′. ing. Therefore, in this modified example, communication between the primary storage server 60 ′ and the secondary storage server 20 ′ is performed when the contents of the management database DB1 are updated, or when file information or the like is read from the management database DB1. As will be described, this modification also simplifies the system configuration in that the management server is not used as compared to the first embodiment. In the second embodiment, the user terminal 40 and the management terminal 45 can be integrated.

  FIG. 18 shows an overall outline of a storage system 70 according to the third embodiment of the present invention. The storage system 70 of the third embodiment is characterized in that the primary storage server 10 and the user terminal 40 in the storage system 1 of the first embodiment are combined and aggregated to form a communication terminal device 80. The communication terminal device 80 corresponds to a terminal (computer, tablet, smartphone, etc.) having a communication function used by the user (client). In the third embodiment, the communication terminal device 80 which is a client terminal used by the user is also the storage system 70. It is an element that composes. Note that the secondary storage server 20, the management server 30, and the management terminal 45 in the third embodiment are the same as those in the first embodiment.

  FIG. 19 shows a main internal configuration when a general personal computer is used as the communication terminal device 80 (corresponding to the first communication device or the storage communication device) of the third embodiment. Basically, FIG. The configuration of the user terminal 40 shown in FIG. That is, the communication terminal device 80 connects various devices such as the communication module 80b, the RAM 80c, the ROM 80d, the input interface 80e, the output interface 80f, and the storage unit 80g to the CPU 80a that performs overall control and various processes. The various devices 80b to 80g are basically equivalent to the user terminal 40 of FIG.

  Note that the communication module 80b can communicate with the secondary storage server 20 and the management server 30 by connecting to a network via a required communication device (not shown, for example, a router or the like). The input interface 80e is connected to a keyboard 80i for receiving operation instructions from the user, a mouse, and the like, and transmits the operation instructions received from the user to the CPU 80a. The output interface 80f is connected to the display 80j, outputs the contents accompanying the processing of the CPU 80a to the display 80j, and allows the user to visually confirm the operation contents and the processing contents.

  The storage unit 80g is a storage device configured by an HDD (Hard Disc Drive), an SSD (Solid State Drive), or the like. In the third embodiment, the storage unit 80g functions as a primary storage and includes a B / A folder 81a and a work folder 81b. It has become a thing. The storage unit 80g stores a terminal processing program P22 in addition to the basic program P20 and the application program P21 stored in the storage unit 10g of the user terminal 40 illustrated in FIG. This terminal processing program P22 is obtained by modifying the server processing program P2 stored in the storage unit 10g of the primary storage server 10 of the first embodiment for a general computer. The content is the same as the processing program P2 of the first embodiment, and the CPU 80a functions as the agent 85 as in the first embodiment, based on the content defined by the terminal processing program P22.

  The processing performed by the CPU 80a functioning as the agent 85 is equivalent to the functions (1) to (13) shown in FIG. 7 of the first embodiment, but the instruction received from the user terminal 40 in the first embodiment. The agent 85 directly receives the file via the input interface 80e, and in the first embodiment, the file to be read is sent from the primary storage server 10 to the user terminal 40 regarding the file read instruction from the user. However, in the third embodiment, the processing of the CPU 80a that functions as the agent 85 in details is different from the case of the MPU 10a in the first embodiment, such as simply reading the file to be read from the storage unit 80g.

  Specifically, the process of the third embodiment is different from the first embodiment in that it is added to the primary storage 11 sent from the user terminal 40 at the stage S1 in the first flowchart of FIG. Regarding the detection of whether or not a target file has been received, in the third embodiment, the agent 85 detects whether a file has been newly added to the B / A folder 81a of the storage unit 80g. In this case, the processing after S3 is performed. Similarly, whether or not an update file (a file for updating a file already stored in the primary storage server 10) sent from the user terminal 40 has been received in step S5 in the second flowchart of FIG. 11B. In the third embodiment, in the third embodiment, the agent 85 detects whether or not the update process of the file stored in the B / A folder 81a of the storage unit 80g has been performed, and the update process is detected. Will perform the processing after S7.

  In addition, regarding the detection of whether or not a file deletion instruction already stored in the primary storage server 10 sent from the user terminal 40 has been received in step S9 in the third flowchart of FIG. In the third embodiment, the agent 85 detects whether an instruction to delete a file stored in the B / A folder 81a is received via the input interface 80e.

  Similarly, in the third embodiment, in the third embodiment, it is detected whether or not a read instruction of a file (dummy file) sent from the user terminal 40 is received in the step S30 in the sixth flowchart of FIG. The agent 85 detects whether an instruction to read a file (dummy file) stored in the B / A folder 81a is received via the interface 80e. Further, regarding sending the actual file replaced from the dummy file to the user terminal 40 in the step S34 in the sixth flowchart of FIG. 14, in the third embodiment, the file replaced from the dummy file is sent via the output interface 80f. The agent 85 (CPU 80a) performs processing to output to the display 80j.

  As described above, in the third embodiment, since the primary storage server 10 and the user terminal 40 in the first embodiment are combined into one as the communication terminal device 80 that is a client terminal, a client that does not use a server (primary storage server). There is a merit that a storage system 70 including the communication terminal device 80 can be constructed with a simple configuration at the terminal level, and communication is performed between the user terminal 40 and the primary storage server 10 performed in the first embodiment. There is no need for exchange, and various file processing can be performed at a level close to the user.

  FIG. 20 shows an overall outline of a storage system 90 according to the fourth embodiment of the present invention. The storage system 90 of the fourth embodiment is a combination of the primary storage server 60 in the storage system 50 of the second embodiment shown in FIG. 15 and the communication terminal device 80 in the storage system 70 of the third embodiment shown in FIG. The communication terminal device 100 is used, and the management server is omitted as in the second embodiment. Note that the secondary storage server 20 and the management terminal 45 in the fourth embodiment are the same as in the first embodiment.

  FIG. 21 shows a main internal configuration when a general personal computer is used as the communication terminal device 100 (corresponding to the first communication device or the storage communication device) of the fourth embodiment. The communication terminal device 100 of the fourth embodiment is basically the same as the communication terminal device 80 of the third embodiment shown in FIG. 19, and includes a communication module 100b, a RAM 100c, and a CPU 10a that performs overall control and various processes. Various devices such as the ROM 100d, the input interface 100e, the output interface 100f, and the storage unit 100g are connected by the internal connection line 100h, and the CPU 100a functions as the agent 105 as in the case of the third embodiment. .

  Similarly to the third embodiment, the storage unit 100g includes a B / A folder 101a and a work folder 101b, and stores a program P20, an application program P21, and a terminal processing program P22. Furthermore, the storage unit 100g of the fourth embodiment stores a terminal management program P23, a backup period J1, and an archive period J2, and also stores a management database DB1.

  The terminal management program P23 stored in the storage unit 100g is modified from the server management program P11 stored in the storage unit 30g of the management server 30 shown in FIG. 9 of the first embodiment for a general computer. However, this terminal management program P23 causes the CPU 100a to perform the processing performed by the management server 30 in the first embodiment, but the management server 30 does not exist alone in the fourth embodiment. The CPU 100a performs processing similar to the processing performed by the MPU 60a of FIG. 16 described in the second embodiment. In summary, the CPU 100a according to the fourth embodiment performs both the processing performed by the MPU 60 according to the second embodiment and the processing performed by the CPU 80a according to the third embodiment.

  Therefore, the storage system 90 of the fourth embodiment has an advantage in that both the effects of the storage system 50 of the second embodiment and the effects of the storage system 70 of the third embodiment can be achieved. The storage system 90 according to the fourth embodiment can be applied to the modifications described in the first embodiment and the second embodiment. For example, the storage system 90 is included in the secondary storage 21 of the secondary storage server 20 and the storage unit 100g. It is also possible to store a copy of the management database DB1 to be stored. Further, as in the case shown in FIG. 17, instead of storing the management database DB1 in the storage unit 100g, the secondary storage of the secondary storage server 20 It is also possible to adopt a configuration in which the information is stored in 21. Further, the management terminal 45 can be combined with the communication terminal device 100 so that an operation for an administrator can be performed on the communication terminal device 100.

  In the present invention, when performing archiving between storages connected by communication, the archiving is performed in a backup state in which the same file is stored in each storage. Therefore, the present invention can be suitably used for performing stable archiving without being influenced by the influence of traffic.

1, 50, 50 ', 70, 90 Storage system 10, 60 Primary storage server (first communication device or storage communication device)
11 Primary storage (first storage device)
11a B / A folder (first folder)
11b Working folder (second folder)
15 Agent 20 Secondary storage server (second communication device)
21 Secondary storage (second storage device)
30 management server 40 user terminal 45 management terminal 80, 100 communication terminal device (first communication device or storage communication device)
80g, 100g storage unit (first storage device)
DB1 management database J1 backup period J2 archive period P1 server program P2 processing program P6 storage program P11 management program P20 basic program P21 application program P22 terminal processing program P23 terminal management program

Claims (15)

A first communication device having a first storage device; and a second communication device having a second storage device having a larger storage capacity than the first storage device and capable of communicating with the first communication device, In a storage system that performs archiving of files stored in a first storage device based on archiving conditions,
Means for detecting whether or not an archive condition is satisfied in a state where a real file is stored in the first storage device and a backup file of the real file is stored in the second storage device;
When the satisfaction of the archiving condition is detected, the actual file stored in the first storage device has a data amount smaller than that of the actual file and is presented as the actual file and is referred to when reading the backup file. A storage system comprising: means for performing a replacement process with a temporary file including reference information. A means for comparing the actual file stored in the first storage device with the backup file stored in the second storage device to determine whether the contents are the same when an archiving condition is satisfied ,
The storage system according to claim 1, wherein when it is determined that the contents of the real file and the backup file are different, the process of replacing the real file with the temporary file is not performed. The first storage device includes a first folder and a second folder;
A process of replacing the actual file stored in the first folder with the temporary file is performed in the first folder;
The storage system according to claim 1 or 2, further comprising means for copying the temporary file replaced with the first folder to a second folder. Means for detecting whether or not a backup condition for backing up a file stored in the first storage device to the second storage device is satisfied;
When the satisfaction of the backup condition is detected, the temporary file copied to the second folder is stored in the second storage device as a backup file of the copied temporary file to the second communication device. Means to upload,
The storage system according to claim 3, further comprising: a unit that deletes the copied temporary file from the second folder when the copied temporary file is uploaded. A means for detecting whether a backup file of the temporary file copied to the second folder is stored in the second storage device when the satisfaction of the backup condition is detected;
5. The apparatus according to claim 4, wherein when it is detected that a backup file of the copied temporary file is stored in the second storage device, the copied temporary file is not uploaded to the second communication device. Storage system. The first storage device includes a first folder and a second folder;
Means for copying the real file to the second folder when the real file is stored in the first folder of the first storage device;
Means for detecting whether or not a backup condition for backing up a file stored in the first storage device to the second storage device is satisfied;
When the satisfaction of the backup condition is detected, the real file copied to the second folder is stored in the second storage device so as to be stored in the second storage device as a backup file of the copied real file. The storage system according to any one of claims 2 to 5, further comprising an uploading unit. A unit for detecting whether a backup file of an actual file copied to the second folder is stored in the second storage device when the satisfaction of the backup condition is detected;
7. The apparatus according to claim 6, wherein when it is detected that a backup file of the copied actual file is stored in the second storage device, the copied actual file is not uploaded to the second communication device. Storage system. A storage system comprising: a first communication device having a first storage device; and a second communication device having a second storage device having a larger storage capacity than the first storage device and capable of communicating with the first communication device In the archiving method for archiving files stored in the first storage device based on archiving conditions,
Detecting whether or not an archive condition is satisfied in a state where a real file is stored in the first storage device and a backup file of the real file is stored in the second storage device;
When the satisfaction of the archiving condition is detected, the actual file stored in the first storage device has a data amount smaller than that of the actual file and is presented as the actual file and is referred to when reading the backup file. And a step of performing a process of replacing the temporary file including the reference information. A storage device capable of communicating with an external communication device having a storage device and having a smaller storage capacity than the storage device of the external communication device, and archiving a file stored in the storage device based on an archive condition In the storage communication device to perform
Means for detecting whether or not an archive condition is satisfied in a state where a real file is stored in the storage device and a backup file of the real file is stored in a storage device included in an external communication device;
When the satisfaction of archiving conditions is detected, the actual file stored in the storage device has a data amount smaller than that of the actual file and is presented as the actual file and is also referred to for reading the backup file A storage communication device comprising: means for performing a process of replacing with a temporary file including. Means for comparing the actual file stored in the storage device with the backup file stored in the storage device of an external communication device to determine whether the contents of the two are the same when an archiving condition is satisfied Prepared,
The storage communication device according to claim 9, wherein when it is determined that the contents of the real file and the backup file are different, the process of replacing the real file with the temporary file is not performed. The storage device includes a first folder and a second folder,
A process of replacing the actual file stored in the first folder with the temporary file is performed in the first folder;
The storage communication device according to claim 9 or 10, further comprising means for copying the temporary file replaced with the first folder to a second folder. Means for detecting whether or not a backup condition for backing up a file stored in the storage device to a storage device included in an external communication device is satisfied;
When the satisfaction of the backup condition is detected, external communication is performed so that the temporary file copied to the second folder is stored in a storage device of an external communication device as a backup file of the copied temporary file. Means for uploading to the device;
The storage communication device according to claim 11, further comprising: a unit that deletes the copied temporary file from the second folder when the copied temporary file is uploaded. The storage device includes a first folder and a second folder,
Means for copying the real file to the second folder when the real file is stored in the first folder of the storage device;
Means for detecting whether or not a backup condition for backing up a file stored in the storage device to a storage device included in an external communication device is satisfied;
When the satisfaction of the backup condition is detected, external communication is performed so that the actual file copied to the second folder is stored in a storage device of an external communication device as a backup file of the copied actual file. The storage communication device according to any one of claims 9 to 12, comprising means for uploading to the device. A storage communication apparatus comprising a storage device capable of communicating with an external communication apparatus having a storage device and having a smaller storage capacity than the storage device of the external communication apparatus performs archiving processing of files stored in the storage device. In the archive processing method based on the archive conditions,
The storage communication device
Detecting whether or not an archive condition is satisfied in a state where a real file is stored in the storage device and a backup file of the real file is stored in a storage device included in an external communication device;
When the satisfaction of archiving conditions is detected, the actual file stored in the storage device has a data amount smaller than that of the actual file and is presented as the actual file and is also referred to for reading the backup file An archiving method comprising: a step of performing a process of replacing with a temporary file including. An archiving condition for archiving a file stored in the storage device in a computer having a storage device capable of communicating with an external communication device having a storage device and having a storage capacity smaller than that of the storage device included in the external communication device In the computer program for making it performed based on
In the computer,
Detecting whether or not an archive condition is satisfied in a state where a real file is stored in the storage device and a backup file of the real file is stored in a storage device included in an external communication device;
When the satisfaction of archiving conditions is detected, the actual file stored in the storage device has a data amount smaller than that of the actual file and is presented as the actual file and is also referred to for reading the backup file And a step of performing a process of replacing with a temporary file including a computer program.

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